Dresden 2011 – scientific programme
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O: Fachverband Oberflächenphysik
O 46: Surface magnetism I (jointly with MA)
O 46.1: Talk
Wednesday, March 16, 2011, 11:15–11:30, CHE 184
Structural and magnetic investigations of Fe3Si/GaAs(001) — •Sani Noor, M. Samet Özkan, and Ulrich Köhler — Experimentalphysik IV, AG Oberflächen, Ruhr-Universität Bochum
Fe3Si has got magnetic and electric properties that make it a possible candidate as a spin aligning material in spintronic devices. Thus, it is of great interest to investigate its growth behaviour on semiconductor substrates.
In this contribution we present growth studies of the system Fe3Si/GaAs(001) as measured by STM. Atomic resolution reveals long range ordering alongside a lattice structure that is to be compared with theory. The influence of varying growth temperatures and post annealing on the surface morphology has been investigated. We find that under the appropriate parameters layer-by-layer growth can be achieved. Magnetic analysis was performed by angular dependent in situ MOKE. While the uniaxial anisotropy remains unaffected by the growth temperature the coercive field scales with it. In order to determine the magnetic moment the samples were measured with SQUID magnetometry. It appears that the magnetic moment shows a dependence on the layer thickness.